Dictionary.com
Thesaurus.com
Synonyms

whistle-blower

British  

noun

  1. informal a person who informs on someone or puts a stop to something

"Collins English Dictionary — Complete & Unabridged" 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

The claim alleges video captured on the devices is routed to contractors in Africa for AI training purposes, citing whistle-blower complaints.

From Barron's • Mar. 31, 2026

Well-known whistle-blower Nelson Amenya voiced similar concerns, urging the Kenyan government to release the full agreement so "we can read it for ourselves".

From BBC • Dec. 5, 2025

These laws demand reporting on safety incidents, strengthen whistle-blower protections, and require disclosures on mental health chatbots—all reasonable and targeted interventions that protect our communities and our families.

From Barron's • Dec. 4, 2025

"It's common knowledge that really what we're doing is a scam. Most of it is to fool the Ogoni people," the whistle-blower said.

From BBC • Feb. 11, 2025

Just as most students at Ohio State University read Liar’s Poker as a how-to manual, most TV and radio interviewers read me as a whistle-blower.

From "The Big Short" by Michael Lewis